The invention provides premixed flow-state stabilized soil. The premixed flow-state stabilized soil is characterized in that the premixed flow-state stabilized soil is a building material which is formed by taking natural soil mass obtained nearby as a primary material, taking a soil mass stabilizing agent as a secondary material and conducting conveying and even stirring through ground machines after adding a certain ratio of water, has liquidity and has certain strength after being hardened, and the premixed flow-state stabilized soil can be widely used for foundation stabilization, groove backfilling, road roadbeds, foundation pit supporting and protecting curtain walls and mine goaf backfilling; and according to component properties of soil and different requirements for finished product strength, materials forming the premixed flow-state stabilized soil include, by mass, 58%-92% of the soil and 8%-42% of the soil mass stabilizing agent. The stabilized soil is high in strength and good in stability after being stabilized, and the premixed flow-state stabilized soil has the beneficial effects that resources are saved, cost is saved, environment friendliness is achieved, construction is flexible, operation is convenient, and the application range is wide.